Originally Posted by
nhluhr
This is wrong. At the bottom of your pedal stroke, your leg is still slightly bent and your ankle is not extended. You don't have to lean far at all to reach the ground on a modern road bike by simply extending your leg and ankle, especially if you're above average height and the BB Height is proportionally small compared to others.
Well, with seat-height at 100-109% of inseam, you will still have bent-knees at bottom of stroke due to a slightly extended ankle. Any seat-height less than 100% of inseam risks knee and hamstring injury. There's been a trend in the past 20-years of lower seat-heights, going from 109 to 103-104% of inseam, but I doubt there's any pro rider sitting lower than 100% of inseam.
And if you look at
ANY start-line before a race, there are
ZERO riders sitting on their seat with their tippy-toes on the ground. It's just not stable, not efficient and looks clumsy. Especially if you wobble and fall over while starting.
http://coachlevi.com/images/menscracestartline510.jpg
And if you must stay in your seat at lights, learn to trackstand:
http://2.bp.blogspot.com/-4GkUQatXiD...rackstand.jpeg